S14 auto to manual swap

[90-240sx]

Well i'm planing on doing a 5 speed swap come spring and I figured i'd start my research now seeing that the S14 requires a lil more finess than an s13 due to it being OBD II. I have searched this topic I'm just looking to see if I can get some definite answers seein im using a sohc tranny.

Basically heres what I have so far for parts.

I pulled all these parts out of my 90 240sx.
Manual transmission
cross member
clutch pedal
hydraulic assembly
flywheel
clutch (getting a new one though)
gusset pieces from the engine (not sure on the correct term)
manual sheet metal piece (not sure on the correct term)
misc bolts (pretty much every bolt that came off the car when I pulled the tranny)

And heres the parts I need

Drive shaft
S14 manual ECU (for a 95)
S14 manual speed sensor

pretty much I was wondering if i'm missing anything. that and will the parts from my 90 240sx work in my 95?

[brainfood]

All of my parts are from an s13 the speedo from the s14 wont fit unless you drill or grind the speedo hole slightly and I left the cas out so it throws engine codes but runs great no problems otherwise. Problem is now I need to figure something out because I need to smog it and it has the check engine light on.

[golfer17]

i got a nonabs s14 manual driveshaft for $375 shipped. you can email me at [email protected] if you are interested.

[NemeGuero]

drill a hole in the top of the bell housing and mount an s14 CPS in there.

[DP_Michelle G]

if it's a 95 it's not obd2

[dct223]

if u use a 90 tranny, u wont have a knock sensor... it will work, but u will throw CEL

[NemeGuero]

the knock sensor isn't on the tranny, its on the block. CPS is on tranny

[brainfood]

if it's a 95 it's not obd2

Yes it is some are homolgations of both but most are obd2 or a primative form and still work the same, ie throwing code when the cas is unplugged and having the cas on the trans unlike obd1 s13's

[DP_Michelle G]

Yes it is some are homolgations of both but most are obd2 or a primative form and still work the same, ie throwing code when the cas is unplugged and having the cas on the trans unlike obd1 s13's

Are you sure about that? The only thing i know about the later 95's is that some have the obd2 3 wire o2 sensor.

[NemeGuero]

obd2 o2 is 4 wire
and 95 is NOT obd2

[dct223]

my mistake, i ment to say cps

my way of thinking about 95's they are neither OBDI nor OBDII, they are sorta in the middle... doesnt have all the emmissions stuff of OBDII, but has a OBD plug for engine diagnostic if u throw a CEL

[90-240sx]

Does anyone have a picture of the cps sensor? If i'm not mistaken isnt that the crank position sensor. wouldnt that be on the engine side not the tranny?

[NemeGuero]

No, it's on the TOP of the transmission bell housing. It reads from the flywheel gears.

[90-240sx]

So when I take out my auto tranny it will have the sensor on the top?

[NemeGuero]

Yes, and then you can see how to drill the hole for the CPS once you remove the sensor.

[90-240sx]

one more question about this sensor when I look at it from the engine bay is the bolts that hold it the same ones used to hold the tranny to the engine?

[NemeGuero]

I don't recall 100% but I know there is a tranny bolt right there

[90-240sx]

so all I need to wire up is that and the speed sensor? and I shouldnt get a check engine light?

[NemeGuero]

That is ALL you need to not through a code, you can run without the speed sensor

[90-240sx]

Just relised no one confirmed if the clutch pedal I have will work in the 95 if someone could verify that would be cool.

[projectRDM]

obd2 o2 is 4 wire
and 95 is NOT obd2


Close. OBD-II front O2 is 3wire on all models. Rear O2 is 3wire on Zenkis, 4wire on Koukis. OBD-I cars have a single wire front sensor, excpet for late year autos that went to the 3wire.

CPS is located directly on top of the bellhousing, slightly towards the driverside, secured with an M6 bolt. There's a metal cover over it. Remove it first, otherwise you risk damaging it when pulling the transmission. It is NOT secured through the block like the starter. It's easy to see if you look below the EGR pipe, between the head and the firewall.

CEL will trip if there is no VSS signal, so make sure it's hooked up too, it will also trip if the neutral and 5th position switches are not connected, but that will require more rewiring and the correct year manual ECU.

[90-240sx]

wow so this means I have OBD I then cuz my o2 sensor has one wire. but the com port in my car is OBD II cuz i've had my check engine light checked lately. So does this mean some things might not be neccesary?

[NemeGuero]

OBD1 cars aren't fully functional OBD2, but they do have the OBD2 diagnostic port. This doesn't mean they're OBD2 tho.

[SR240DET]

also.. i did find out s13 drive shaft wont fit... and if you do use a s13 tranny on your s14 remove the black dust cover on the very back of the tranny or else your shit will mess up..

[yupuspeed]

seems like a waste of time and money to do this swap....just buy a 5spd

[turbofreeky]

yeah i would have to say the same, unless you have already put a lot of money into the car

[NemeGuero]

Just because it's over your head to comprehend how to do the swap, doesn't mean other people can't handle it.

[dct223]

seriously... but hey, thats y people on this forum pay shops 500-1000 for labor for a motor swap, when it can be done in a day with a couple of friends and some beer....

[golfer17]

Just relised no one confirmed if the clutch pedal I have will work in the 95 if someone could verify that would be cool.

yeah, it will work fine. the jdm clutch pedal will also work fine but it will require a little bit of modification (in case anyone else is wondering, and i also have one of those for sale...)

[90-240sx]

first off I would have bought a 5 speed but i couldnt pass this deal down 1300 for a unmolested 95 240sx is crazy where I live especially seeing its from florida and i'm now the second owner. also i've done a 5 speed swap before with my friend on his 90 240sx its not all that hard the only reason i have so many questions is cuz 95's and up seem to bring a lot of confusion as to what is needed.

Edit Just wondering does anyone know if i can use the speed sensor on the auto tranny on the manual tranny

[90-240sx]

Bump does any one know about that speed sensor question i had

[dct223]

if ur using a damn s13 tranny, u need to use a s13 speed sensor... I suggest finding a s14 tranny, that way u dont have to drill and tap the top bell housing for the cps, and have plug and play on other misc sensors. Any s14 tranny will work, u dont need to get a "obdII s14 transmission" cus they are all the same.

[NemeGuero]

No, the s14 auto sensor does NOT fit in the s13 tranny.
You need an s14 VSS for an s14 car. Tranny makes no difference. Its the clutster that reads different against the size of the pinion gear.

You can try swapping pinion gears, but I'm trying that now and it STILL won't work without some modification to the pinion gear from the s14 auto. (input shaft is too big)

[90-240sx]

more questions. I was lookin under my dash the other day cuz im planing on mounting my clutch pedal soon. (im gonna do this swap in stages seeing its my DD) and I noticed this ecu looking type thing so i was going through the FSM and I think that this is the auto tranny control unit. my question is do I just remove this and toss it when I do the 5 speed swap?

[NemeGuero]

more questions. I was lookin under my dash the other day cuz im planing on mounting my clutch pedal soon. (im gonna do this swap in stages seeing its my DD) and I noticed this ecu looking type thing so i was going through the FSM and I think that this is the auto tranny control unit. my question is do I just remove this and toss it when I do the 5 speed swap?
Yep